Ultrafine pattern forming method and ultrafine etching method us

Etching a substrate: processes – Masking of a substrate using material resistant to an etchant – Mask resist contains organic compound

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216 66, 216 75, 216 79, 430296, 430313, 430942, 430967, C23F 100

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057026203

ABSTRACT:
A resist film consisting of 5,11,17,23,29,35-hexachloromethyl-37, and soluble to a solvent is formed on a substrate etchable by a dry etching, has a selective region thereof exposed to the high-energy beam, with a remaining region unexposed thereto, and developed to define a pattern on the substrate, as the remaining region is removed by the solvent, before the substrate with the pattern is subjected to the dry etching. A nanometric patterning and etching is permitted, with a reduced process time.

REFERENCES:
patent: 5143784 (1992-09-01), Mita
Toshiyuki Yoshimura et al., "Nano edge roughness in polymer resist patterns", Applied Physics Letters, vol.63, #6, Aug. 9, 1993, pp. 764-766.
C. David Gutsche et al., "Calixarenes 12 --The Synthesis of Functionalized Calixarenes", Tetrahedron, vol. 42, No. 6, 1986, pp. 1633-1641.
"Fifth International Symposium on Inclusion Phenomena and Molecular Recognition", Abstract of Plenary Lectures and Posters, Orange Beach, Alabama, Sep. 18-23, 1988, pp. 3 and 4.
Mario Almi et al., "Chloromethylation of Calixarenes and Synthesis of New Water Soluble Macrocyclic Hosts", Tetrahedron, vol. 45, No. 7, pp. 2177-2183, 1989.

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